This evening I received the worst customer service ever.

Just a couple of things to note as a customer myself.  In-store associates do not have access to view orders placed online.  When items are delivered to a store.  Those items need to be inventoried and scanned into the system.  If that hasn’t been done yet, the associate might not know whether or not the device is there or even have the authority to open shipments that arrive at the store.  This is something usually taken care of by the manager or a long time trusted employee.  

That said.  The best way to address your complaint would be for you to submit it to the T-Force Team by DM’ing what you mentioned in your post to T-Mobile on Facebook or Twitter.  That will reach tier 2 support to have it passed on to the correct people to address it.  T-Force should also be able to check up on your online order.